Authors: Fucheng Wang Xiaodong Du Maji Zhan Jingwei Lang Dan Zhou Guangfu Liu Jian Shen
Publish Date: 2015/11/04
Volume: 24, Issue: 12, Pages: 4673-4680
Abstract
In this study SiC particles were first coated with Cr to form a layer that can protect the SiC particles from dissolution in the molten pool Then the CrSiC powder was injected into the tail of molten pool during plasmatransferred arc welding process PTAW where the temperature was relatively low to prepare CrSiC particles reinforced Febased alloy coating The microstructure and phase composition of the powder and surface coatings were analyzed and the element distribution and hardness at the interfacial region were also evaluated The protective layer consists of Cr3Si Cr7C3 and Cr23C6 which play an important role in the microstructure and mechanical properties The protective layer is dissolved in the molten pool forming a flocculent region and a transition region between the SiC particles and the matrix The tribological performance of the coating was also assessed using a ringblock sliding wear tester with GGr15 grinding ring under 490 and 980 N load CrSiC particlesreinforced coating has a lower wear rate than the unreinforced coatingThe author acknowledges the financial support from the State Key Development Program of Basic Research of China 2011CB013402 the Natural Research Fund of Education Bureau of Anhui Province No KJ2012 A232 and the Key Technology RD Program of Anhui Province 1301021006
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